Excavating – Peat excavators
Patent
1977-08-08
1978-11-07
Crowder, Clifford D.
Excavating
Peat excavators
138122, 138DIG5, 285114, 285137R, 285227, E02F 390
Patent
active
041238605
ABSTRACT:
Rigid pipe sections of a dredger are pivotally connected to allow universal movement therebetween and a flexible, elastic bellows communicates the adjacent ends of the pipe sections. The bellows in its free state is prestressed so as to be under compression and is further compressed when in place between the ends of the pipe sections.
REFERENCES:
patent: 3828451 (1974-08-01), De Koning et al.
Anaconda Bulletin AX-97; "AX Tubing for Tough Expansion Problems;" 4 pages; Copyright 1959.
de Koning Jan
van den Brink Theodorus
Wolters Tjako A.
Ballast-Nedam Groep N.V.
Crowder Clifford D.
Snyder John P.
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